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This tip will help those who have forgotten their bios password not windows password.Your bios password is the password your computer asks for as soon as you power up your system. The windows password is the password needed to log onto your screen name.If you have forgotten your bios password almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery.

When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. E.G. If the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.Make sure to turn the PC off before opening the cabinet and resetting the jumper.

You got 2 options:
1-Start the pc and when you see Windows Welcome screen / Login screen,
press ctrl>+alt>+del> keys twice and it'll show Classic Login
box. Now type "Administrator" (without quotes) in Username and leave
Password field blank. Now press Enter and you should be able to log in
Windows.
Now you can reset your account password from "Control Panel -> User
Accounts".
Same thing can be done using Safe Mode. In Safe Mode Windows will show
this in-built Administrator account in Login screen.
2-Some computer systems have a setting in the BIOS Setup to disable the
password. The BIOS Setup is accessed with the F1, F2 or DEL key during
boot up.
If you have forgotten your password, most systems have a jumper on the
motherboard that can be pulled off to clear the password. If there is no
jumper available, you can also remove the battery for 5 minutes to
clear CMOS.

This information is intended for experienced users. It is not intended for basic users, hackers, or computer thieves. Please do not try any of following procedures if you are not familiar with computer hardware. I'll not be responsible for the use or misuse of this information, including personal injury, loss of data or hardware damage. So use it at your own risk.

A. By Using the Motherboard Jumper:

In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.

Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.

When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.

Make sure to turn the PC off before opening the cabinet and resetting the jumper.

B. By Using Software:

I have found that BIOS/CMOS Password Recovery Tool is the most effective.:BIOS/CMOS Password Recovery Tool is a program that works instantly to remove any lost or forgotten BIOS/CMOS password. Simply boot your PC to DOS and execute the program, and get access to forgotten BIOS/CMOS passwords in just seconds

IF YOU KNOW THE BIOS PASSWORD YOU CAN GO TO BIOS AND CLICK ON CHANGE PASSWORD AND IF YOU FORGOT THE BIOS PASSWORD YOU NEED TO OPEN THE SYS. AND ON MOTHERBOARD THEIR IS A SMALL JUMPER THAT SAYS BIOS JUMPER ON IT YOU NEED TO REMOVE IT AND PUT IT IN PRONK 2 &3 AND RESTART THE SYS. AND THEN AGIN TURN OFF THE SYS. AND PUT THE JUMPER BACK TO PRONK 1 & 2 AS IT WAS EARLIER. AND IT WILL REMOVE THE BIOS PASSWORD.

It is bios password.Now if you forgot it then you have reset your bios settings.For that you have to open back cover of laptop.Then find motherbord pull CMOS cell from motherbord for 10 minutes then put again to it's position.Then it not ask for password.Let me know if you need more assistance.Thanks.

Question:
How to clear an unknown BIOS password.
Answer:
If you have mistakenly forgot or lost your BIOS password or you receive a password at boot that you do not know, you will need to clear the BIOS password by one of the below methods. Precaution: When inside the computer please be sure of the potential of ESD.

Try using generic BIOS passwords. A complete listing of these passwords can be found on document CH000451.

There are utilities designed to help bypass BIOS passwords. An example of a great utility to decrypt / bypass BIOS passwords is the PC BIOS Security and Maintenance toolkit, which is available by clicking here.

On the computer motherboard locate the BIOS clear / password jumper or dipswitch and change its position. Once this jumper has been changed, turn on the computer and the password should be cleared. Once cleared, turn the computer off and return the jumper or dipswitch to its original position.

The location of the jumpers or dipswitches may vary; however, here are general locations where these jumpers / dipswitch may be located.

On the edge of the motherboard - Most jumpers are located on the side of the motherboard for easy accessibility, verify by looking at all visible edges of the motherboard.

By the CMOS battery - Some manufactures will place the jumper to clear the CMOS / BIOS password by the actual CMOS battery.

By the processor - Some manufactures will place the jumpers by the processor of the computer. However, note that in some cases these jumpers will be to change the processor and not the password.

Under the keyboard or bottom of laptop - If you are working on a laptop computer the location of the dipswitch (almost never a jumper) can be under the keyboard or on the bottom of the laptop in a compartment such as the memory compartment.

Other visible location - While it is possible that the jumpers / dipswitches may not be in a visible location, most manufactures try to make things easier by placing the jumpers / dipswitches in another visible location.

Additionally, when looking for the jumper / dipswitch the label of that switch can be anything; however, in most cases will be labeled CLEAR - CLEAR CMOS - JCMOS1 - CLR - CLRPWD - PASSWD - PASSWORD - PWD.

On the computer motherboard locate and remove the CMOS battery for at least 10 minutes allowing the computer to lose its information. Note: this will not work on all computers.

If your manufacturer has a bypass password this can be entered and allow you access to the BIOS and/or computer. Because of the security risk of a bypass password, generally only older computers will have this option. In addition, it is likely that this information will only be able to be obtained from the computer, motherboard or BIOS manufacturer.

On the computer motherboard locate the CMOS solder beads and jump the solder beads to clear the password. The identification and location of these solder beads can vary and if not available in computer documentation is generally only obtainable through the computer manufacturer.

If one of the above solutions do not clear the password or you are unable to locate the jumpers or solder beads, it is recommended you contact the computer manufacturer or motherboard manufacturer for the steps on clearing the computer password.

1. Turn off the laptop2. Disconnect AC adapter 3. Remove battery pack, and remove the keyboard 4. Remove the battery (located underneath the keyboard, the red/white wire) 5. Leave it for about 30 - 60 mins.6. Reconnect the battery and reassemble the laptop 7. Reconnect AC adapter (Don't put in the battery pack yet!) 8. Turn on the computer and press F10 to enter the BIOS9. Set the new BIOS password and save all settings. 10. Turn off the laptop and reinsert the battery

If this does not work you can try and check out a manual for your laptop here.